Soldering compound.



,iinrrnn STATES PATENT OFFICE.

JOHN J. MOSSOP AND WILLIAM MAGRADY, OF PHILADELPHIA, PENN- SYLVANIA,ASSIGNORS OF ONE-FOURTH TO CHARLES DONOV-AN, OF NARBERTH, PENNSYLVANIA,AND ONE-FOURTH TO JOSEPH F. DONO- VAN; OF PHILADELPHIA, PENNSYLVANIA.

SQLDERING Specification of Letters Patent. I

COMPOUND.

Patented Sept. 19, 1905.

Application filed March 19, 1904:. Sei-ial No- 199,044

application or addition of a suitable solder or without weakening theiron in the process. In all methods or processes which we have seenemployed for this purpose the effect or tendency has been to weaken theiron err either side of the fracture, and the effect of any undue strainhas been to produce a new fracture alongside of and arallel to the oldfracture. This fact has le us to seek to produce a chemical combinationto be a plied to the surfaces to be brazed which Wlll enable the iron toretain its original properties as near as may be, and thereby preventits being weakened in the process of brazing.

A series of careful tests made on the most approved testing-machines andconducted by experts in testing have demonstrated that the ironsurrounding the repaired. fracture which has been treated with ourcompound I is strengthened, as in all tests made the new To form oursoldering compound we use two (2) parts of prussiate of potash dissolvedin one (1) part 0 hydrochloric acid, to which is added one (1) part ofammonium chlorid and four (4) parts of water. The active constituentsare cyanid of potassium, hydrochloric acid, and ammonium chlorid in aliquid state. An other chemical in this solutioni's re arde as an impurty.

M etho of using-The abutting surfaces of the fracture are carefullycleaned and the soldering com ound applied to both of them' as a paintwit a paint-brush. The piece is then held together in perfectalinementand.

while in this position is heated to a temperature approximating '1,100.An ordinary flux is now applied to the fracture, and while,

at this temperature the spelter in a granulated form is applied,sufficient bein used to fill the entire space between the acturedsurfaces. The article is then allowed to cool gradually. Havin plained te results'obtained by its use, what we claim, and desire to secure byLetters Patent of the United States, is A soldering compound for use inbrazing cast-iron, consisting of prussiate of potash, hydrochloric acid,ammonium chlorid and. water substantially as set forth.

. JOHN J. MOSSOP. [L. s.] WILLIAM MAGRADY. [L. s.]

Witnesses:

fracture has been at some distance from the old fracture.

'E. J. COLLINS,

' J HOWARD SMITH.

described our compound and ex

